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Diffstat (limited to 'deps/raylib/examples/shaders/shaders_lightmap.c')
| -rw-r--r-- | deps/raylib/examples/shaders/shaders_lightmap.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/deps/raylib/examples/shaders/shaders_lightmap.c b/deps/raylib/examples/shaders/shaders_lightmap.c new file mode 100644 index 0000000..91ed8bf --- /dev/null +++ b/deps/raylib/examples/shaders/shaders_lightmap.c @@ -0,0 +1,174 @@ +/******************************************************************************************* +* +* raylib [shaders] example - lightmap +* +* NOTE: This example requires raylib OpenGL 3.3 or ES2 versions for shaders support, +* OpenGL 1.1 does not support shaders, recompile raylib to OpenGL 3.3 version. +* +* NOTE: Shaders used in this example are #version 330 (OpenGL 3.3). +* +* Example contributed by Jussi Viitala (@nullstare) and reviewed by Ramon Santamaria (@raysan5) +* +* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified, +* BSD-like license that allows static linking with closed source software +* +* Copyright (c) 2019-2024 Jussi Viitala (@nullstare) and Ramon Santamaria (@raysan5) +* +********************************************************************************************/ + +#include <stdio.h> +#include <stdlib.h> + +#include "raylib.h" +#include "raymath.h" +#include "rlgl.h" + +#if defined(PLATFORM_DESKTOP) + #define GLSL_VERSION 330 +#else // PLATFORM_ANDROID, PLATFORM_WEB + #define GLSL_VERSION 100 +#endif + +#define MAP_SIZE 10 + +//------------------------------------------------------------------------------------ +// Program main entry point +//------------------------------------------------------------------------------------ +int main(void) +{ + // Initialization + //-------------------------------------------------------------------------------------- + const int screenWidth = 800; + const int screenHeight = 450; + + SetConfigFlags(FLAG_MSAA_4X_HINT); // Enable Multi Sampling Anti Aliasing 4x (if available) + InitWindow(screenWidth, screenHeight, "raylib [shaders] example - lightmap"); + + // Define the camera to look into our 3d world + Camera camera = { 0 }; + camera.position = (Vector3){ 4.0f, 6.0f, 8.0f }; // Camera position + camera.target = (Vector3){ 0.0f, 0.0f, 0.0f }; // Camera looking at point + camera.up = (Vector3){ 0.0f, 1.0f, 0.0f }; // Camera up vector (rotation towards target) + camera.fovy = 45.0f; // Camera field-of-view Y + camera.projection = CAMERA_PERSPECTIVE; // Camera projection type + + Mesh mesh = GenMeshPlane((float)MAP_SIZE, (float)MAP_SIZE, 1, 1); + + // GenMeshPlane doesn't generate texcoords2 so we will upload them separately + mesh.texcoords2 = (float *)RL_MALLOC(mesh.vertexCount*2*sizeof(float)); + + // X // Y + mesh.texcoords2[0] = 0.0f; mesh.texcoords2[1] = 0.0f; + mesh.texcoords2[2] = 1.0f; mesh.texcoords2[3] = 0.0f; + mesh.texcoords2[4] = 0.0f; mesh.texcoords2[5] = 1.0f; + mesh.texcoords2[6] = 1.0f; mesh.texcoords2[7] = 1.0f; + + // Load a new texcoords2 attributes buffer + mesh.vboId[SHADER_LOC_VERTEX_TEXCOORD02] = rlLoadVertexBuffer(mesh.texcoords2, mesh.vertexCount*2*sizeof(float), false); + rlEnableVertexArray(mesh.vaoId); + + // Index 5 is for texcoords2 + rlSetVertexAttribute(5, 2, RL_FLOAT, 0, 0, 0); + rlEnableVertexAttribute(5); + rlDisableVertexArray(); + + // Load lightmap shader + Shader shader = LoadShader(TextFormat("resources/shaders/glsl%i/lightmap.vs", GLSL_VERSION), + TextFormat("resources/shaders/glsl%i/lightmap.fs", GLSL_VERSION)); + + Texture texture = LoadTexture("resources/cubicmap_atlas.png"); + Texture light = LoadTexture("resources/spark_flame.png"); + + GenTextureMipmaps(&texture); + SetTextureFilter(texture, TEXTURE_FILTER_TRILINEAR); + + RenderTexture lightmap = LoadRenderTexture(MAP_SIZE, MAP_SIZE); + + SetTextureFilter(lightmap.texture, TEXTURE_FILTER_TRILINEAR); + + Material material = LoadMaterialDefault(); + material.shader = shader; + material.maps[MATERIAL_MAP_ALBEDO].texture = texture; + material.maps[MATERIAL_MAP_METALNESS].texture = lightmap.texture; + + // Drawing to lightmap + BeginTextureMode(lightmap); + ClearBackground(BLACK); + + BeginBlendMode(BLEND_ADDITIVE); + DrawTexturePro( + light, + (Rectangle){ 0, 0, light.width, light.height }, + (Rectangle){ 0, 0, 20, 20 }, + (Vector2){ 10.0, 10.0 }, + 0.0, + RED + ); + DrawTexturePro( + light, + (Rectangle){ 0, 0, light.width, light.height }, + (Rectangle){ 8, 4, 20, 20 }, + (Vector2){ 10.0, 10.0 }, + 0.0, + BLUE + ); + DrawTexturePro( + light, + (Rectangle){ 0, 0, light.width, light.height }, + (Rectangle){ 8, 8, 10, 10 }, + (Vector2){ 5.0, 5.0 }, + 0.0, + GREEN + ); + BeginBlendMode(BLEND_ALPHA); + EndTextureMode(); + + SetTargetFPS(60); // Set our game to run at 60 frames-per-second + //-------------------------------------------------------------------------------------- + + // Main game loop + while (!WindowShouldClose()) // Detect window close button or ESC key + { + // Update + //---------------------------------------------------------------------------------- + UpdateCamera(&camera, CAMERA_ORBITAL); + //---------------------------------------------------------------------------------- + + // Draw + //---------------------------------------------------------------------------------- + BeginDrawing(); + ClearBackground(RAYWHITE); + + BeginMode3D(camera); + DrawMesh(mesh, material, MatrixIdentity()); + EndMode3D(); + + DrawFPS(10, 10); + + DrawTexturePro( + lightmap.texture, + (Rectangle){ 0, 0, -MAP_SIZE, -MAP_SIZE }, + (Rectangle){ GetRenderWidth() - MAP_SIZE*8 - 10, 10, MAP_SIZE*8, MAP_SIZE*8 }, + (Vector2){ 0.0, 0.0 }, + 0.0, + WHITE); + + DrawText("lightmap", GetRenderWidth() - 66, 16 + MAP_SIZE*8, 10, GRAY); + DrawText("10x10 pixels", GetRenderWidth() - 76, 30 + MAP_SIZE*8, 10, GRAY); + + EndDrawing(); + //---------------------------------------------------------------------------------- + } + + // De-Initialization + //-------------------------------------------------------------------------------------- + UnloadMesh(mesh); // Unload the mesh + UnloadShader(shader); // Unload shader + UnloadTexture(texture); // Unload texture + UnloadTexture(light); // Unload texture + + CloseWindow(); // Close window and OpenGL context + //-------------------------------------------------------------------------------------- + + return 0; +} |